Energy Analysis And Optimal Operation Of Reservoir Ecosystem Service Valu

The traditional optimal operation of reservoir groups mainly considers how to obtain the highest economic benefits from the aspects of safety and economy.The current ecological optimal operation of reservoir groups is a reservoir operation method which increases the constraint conditions of ecological water demand based on the traditional optimal operation of reservoir groups.The emergy optimal dispatching mode of reservoir group ecological service value takes the emergy of the total ecosystem service value of reservoir group as the optimization objective,and meets the requirements of ecological service function flow and social and economic water consumption as the constraint conditions.In order to rationally develop water resources of river reservoir groups from emergy perspective,efficiently utilize emergy of ecosystem service value of reservoir groups,ensure sustainable water use for social and economic development,and maintain the health of river basin ecosystem,In view of the shortcomings of traditional（current）reservoir group scheduling and the superiority of emergy analysis method to evaluate different levels of energy and different kinds of energy flow,logistics and information flow,this paper applies emergy analysis to reservoir ecological scheduling,and puts forward the emergy analysis and optimal scheduling of ecosystem service value of river reservoir group.The specific research content and results are as follows:（1）The concept of river reservoir group ecosystem and its service function are introduced.The ecosystem service function of river reservoir group is divided into 5 primary functions and16 secondary functions.The definition,connotation and calculation model of ecosystem service discharge of river reservoir group are introduced.This paper expounds the theory and method of ecological service effect and service value evaluation of river reservoir group ecosystem service function discharge.（2）By introducing the emergy analysis technique and combining with the characteristics and composition of the ecosystem service function of river reservoir group,the emergy evaluation model of the ecosystem service function discharge of river reservoir group is established.The emergy evaluation thought and steps of river reservoir group ecosystem service discharge are proposed.（3）By introducing the emergy dispatching concept of reservoir ecosystem service value,the emergy conventional dispatching model and optimal dispatching model of river reservoir ecosystem service value are established.The conventional and optimization algorithms of emergy scheduling are analyzed and compared.（4）Taking Xinfengjiang,Fengshuba and Baipenzhu as the research object,based on 26years of monthly runoff data of the three backbone reservoirs in the Dongjiang river basin,a trial algorithm was used to calculate the runoff regulation of the reservoirs in the Dongjiang river basin,and the emergy value of the ecosystem service value of the three backbone reservoirs was evaluated.The results show that the emergy value of the function service value of Xinfengjiang reservoir and Fengshuba reservoir and Dongjiang river basin are the same:in the order of ecological regulation>ecological support>freshwater supply>cultural entertainment>material production.The order of emergy value of service function of Baipenzhu reservoir is ecological support>ecological regulation>freshwater supply>cultural entertainment>material production.（5）The newly developed bionic algorithm--ant colony algorithm is applied to optimize the operation and calculation of the inflow combination of 13 different reservoirs,and the energy value of the downstream discharge scheme,the ecological water consumption of the reservoir,the social and economic water supply,the power generation and the ecosystem service value are obtained under 13 inflow conditions.（6）The conventional dispatching results of Dongjiang River Basin show that the total emergy value of wet year,normal year,dry year are:1.62×10²³sej,1.57×10²³sej,1.53×10²³sej;and the generating capacity are:15.34×10⁸k Wh,11.19×10⁸k Wh,7.16×10⁸k Wh.The total emergy results by optimal scheduling of wet year,normal year,dry year are:1.94×10²³sej,1.89×10²³sej,1.85×10²³sej;and the generating capacity are:18.32×10⁸k Wh,14.31×10⁸k Wh,9.29×10⁸k Wh.The emergy optimization operation of the ecosystem service value of river reservoir groups is conducive to maintaining the function of the ecosystem of river reservoir groups,restoring the health of the ecosystem of river reservoir groups,and can be extended to other river reservoir groups,so as to solve water demand problem of economic society and ecological environment and restore the ecological environment of river reservoir groups.To maintain the healthy development of river ecosystems and promote the sustainable use of water resources.